Let me introduce you to my adaptation of Thorin´s ring from movie Hobbit.

The ring is designed in Fusion360. The inner diameter is 20mm so anyone can scale it in slicer to own size of finger. 

I tried to apply some blue color to the place where should be a gem stone. That is the only post processing I have done.

You can see my print file with supports on print bed. It went really nice for me on my Prusa mini+.

I would be very happy to see some other prints here in comments!